A waste gas purification device and production process based on borax antioxidant production

Abstract

The application belongs to the technical field of waste gas purification, and particularly relates to a waste gas purification device and production process based on borax antioxidant production. The application comprises a pulverizer main body, a pulverizer feeding bin connected to the top of the pulverizer main body, a reinforcing cover plate installed at the opening of the pulverizer feeding bin, a soft cover installed above the pulverizer main body, a front cover connected to the surface of the soft cover, flexible side covers connected to the two sides of the front cover, support arms reinforced on the surface of the flexible side covers, a top protruding plate provided on the top of the reinforcing cover plate, and a connecting shaft fixed to the bottom end of the support arm, so that the flexible side cover and the front cover can expand or close the soft cover side space with the rotating shaft as the rotating shaft point. By adopting the flexible side cover and the front cover split structure which can be opened and closed, only the rotating avoidance space is needed when feeding, the whole cover body does not need to be opened, the feeding port is immediately sealed after feeding is completed, the instantaneous scattered dust of borax feeding and crushing is intercepted from the source, and the borax powder high floating characteristics are adapted.

Description

Technical Field

[0001] This invention relates to the field of waste gas purification technology, specifically to a waste gas purification device and production process based on borax antioxidant. Background Technology

[0002] Borax antioxidant is an inorganic powder antioxidant additive made with industrial decahydrate borax as the core active component and compounded with high-temperature dispersant. It is mainly used in metallurgical molten iron reduction, high-temperature oxidation resistance of refractory materials, and protection of special ceramics. It belongs to dry powder fine processing products.

[0003] Its standard production process is as follows: lumpy borax raw material - feeding into the crusher feeding hopper - crushing and refining by high-speed crusher - grading by screening and conveying components - homogenization and mixing by conical double spiral mixer - metering and packaging - finished borax antioxidant.

[0004] In the above, the feed port of the crusher has an open structure. During the manual or mechanical feeding and high-speed crushing and shearing process of borax raw materials, a large amount of fine borax dust will be generated. This powder has strong buoyancy and high surface adhesion, and is very easy to be scattered when the feed is opened and closed.

[0005] Therefore, we propose a waste gas purification device and production process based on borax antioxidant production to solve the above problems. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a waste gas purification device and production process based on borax antioxidant production, which solves the problem mentioned in the background technology that the feed port of the crusher has an open structure, and that a large amount of fine borax dust is generated during the manual or mechanical feeding and high-speed crushing and shearing process of borax raw materials. This dust has strong buoyancy and high surface adhesion, and is very easy to be scattered when the feed port is opened and closed.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention specifically adopts the following technical solution:

[0010] A waste gas purification device and production process based on borax antioxidant production includes a main body of a crusher, a crusher feeding bin connected to the top of the main body of the crusher, a reinforcing cover plate installed at the opening of the crusher feeding bin, a soft cover installed above the main body of the crusher, a front baffle connected to the surface of the soft cover, and flexible side covers connected to both sides of the front baffle.

[0011] The flexible side cover surface is reinforced with a support arm; the top of the reinforced cover plate is provided with a top protrusion plate, the bottom end of the support arm is fixed with a connecting shaft, and the side end of the connecting shaft is fixed with a rotating shaft rod that rotates in the top protrusion plate; so that the flexible side cover and the front cover can expand or close the side space of the soft cover with the rotating shaft rod as the rotation axis.

[0012] Furthermore, the reinforced cover plate has an opening that matches the feeding port of the crusher's feeding hopper; the flexible side cover and the front cover can be unfolded to cover the outside of the opening of the cover plate.

[0013] Furthermore, an operating lever is fixed to the side end of the rotating shaft, and the operating lever is U-shaped and surrounds the front side of the soft cover.

[0014] Furthermore, a rigid conical cover is installed above the soft cover, wherein a rigid collar is connected to the bottom of the rigid conical cover and a rigid inner ring is connected to the top of the soft cover; the diameter of the rigid inner ring is smaller than the diameter of the rigid collar so that the rigid inner ring can be inserted longitudinally into the inside of the rigid collar; a clamp for locking the rigid collar and the rigid inner ring is fitted over the rigid collar.

[0015] Furthermore, ribs are installed at the corners of the soft cover, and the tops of multiple sets of ribs are connected to a rigid inner ring.

[0016] Furthermore, the top of the rigid conical cover is connected to a guide tube and a support structure for stabilizing the rigid conical cover, with the bottom of the support connected to the frame.

[0017] Furthermore, an extension plate with a diameter larger than that of the rigid collar is fixed to the outer wall of the rigid collar. A movable groove is formed on the surface of the extension plate. A sliding rod is slidably connected in the groove of the movable groove. A contact rod is connected to the top of the sliding rod extending to one side. A detachable, high-durability spring is installed in the cavity of the movable groove, with one end connected to the sliding rod and the other end connected to the inner wall of the movable groove.

[0018] Furthermore, a movable plate is installed at the front end of the contact rod, wherein multiple sets of convex balls are installed on the surface of the movable plate at intervals; a functional plate is fixed on the surface of the contact rod, and a mounting hole is opened on the surface of the functional plate, into which a functional bending rod is inserted; a connecting plate is fixed at the bottom of the functional bending rod, and a threaded locking hole is provided on the surface of the connecting plate at equal intervals in the longitudinal direction, into which a vibrating contact element is screwed.

[0019] Furthermore, a rocker arm is reinforced and connected to the surface of the movable plate. The bottom of the rocker arm is fixed to the surface of the rotating shaft, so that the rocker arm can rotate synchronously with the movement of the operating lever. A triangular plate is fixed on the reinforced cover plate, and an arc-shaped rail groove is opened on the surface of the triangular plate. A support rod is fixed on the surface of the operating lever, and a positioning sleeve is fixed on the side of the support rod.

[0020] The positioning sleeve has a sliding connection to a movable inner rod. A spring assembly is installed between the positioning sleeve and the movable inner rod. The surface of the arc-shaped rail groove has a positioning inner hole that allows the front end of the movable inner rod to be inserted.

[0021] A waste gas purification process based on borax antioxidant production.

[0022] S1. Device installation and system integration:

[0023] The reinforcing cover plate is fixedly installed on the top of the crusher's feeding hopper, ensuring precise alignment between the cover plate opening and the feeding hopper. The rigid inner ring at the top of the soft cover is inserted into the rigid collar at the bottom of the rigid conical cover, and the dust collection cover is locked and sealed using clamps, thus completing the dust collection cover assembly. The guide pipe at the top of the rigid conical cover is connected in sequence to the cyclone pretreatment device, the bag filter, and the exhaust gas purification tower. The screening and conveying components at the bottom of the crusher's main body are connected in sequence to the screening machine and the conical double spiral mixer, forming a complete production system of feeding, crushing, screening, mixing, and exhaust gas purification.

[0024] S2. Feeding operation and dust collection hood opening and closing:

[0025] Move the operating lever to rotate the rotating shaft, causing the flexible side cover and front cover to rotate and unfold, clearing the feeding space of the cover opening; put the raw materials for borax antioxidant production into the main body of the crusher through the crusher feeding bin. After feeding is completed, move the operating lever in the opposite direction to make the flexible side cover and front cover rotate and close. The moving inner insertion rod is inserted into the positioning inner hole under the action of the spring assembly, completing the sealing and locking of the dust collection cover.

[0026] S3. Crushing, sieving and mixing operations:

[0027] When the crusher is started, the raw material is crushed inside the main body of the crusher. The crushed material falls into the screening and conveying assembly, is screened and graded by the screening machine, and qualified material is conveyed to the conical double spiral mixer for uniform mixing before entering the metering and packaging process. The dust and exhaust gas generated during the crushing and screening process overflows upward from the crusher's feeding hopper.

[0028] S4. Negative pressure dust collection and linked dust vibration pretreatment:

[0029] When the negative pressure dust collection system is activated, a stable micro-negative pressure is formed inside the rigid conical hood and the soft hood, firmly gathering the overflowing dust and exhaust gas in the dust collection chamber. The opening and closing action of the operating lever synchronously drives the rocker arm and the moving plate to move. Through the convex ball and the sliding plug, the contact rod is driven to move back and forth, causing the vibrating contact to intermittently strike the outer wall of the soft hood and the outer wall of the rigid conical hood, shaking off the borax powder adhering to the inner wall, thus completing the pre-treatment of dust.

[0030] S5. The dust-laden waste gas, after pretreatment, sequentially enters a cyclone pretreatment device through a guide pipe to remove large dust particles, then enters a bag filter to filter fine dust, and finally undergoes deep purification in a waste gas purification tower to remove trace impurities and odors. The purified gas meets environmental emission standards and is then discharged at high altitude. The collected borax dust can be recycled back to the production system, reducing raw material loss.

[0031] (III) Beneficial Effects

[0032] Compared with the prior art, the present invention provides a waste gas purification device and production process based on borax antioxidant production, which has the following beneficial effects:

[0033] This invention employs a rotatable and closable flexible side cover and a front cover split structure. When feeding materials, the material is only rotated to avoid space without having to lift the entire cover. After feeding is completed, the feeding port is immediately sealed, intercepting the instantaneous dust from the feeding and crushing of borax at the source, which is suitable for the high floating characteristics of borax powder.

[0034] This invention utilizes the opening and closing action of an operating lever to simultaneously connect a rocker arm, a moving plate, and a vibrating contact element, achieving intermittent knocking of the outer wall through purely mechanical transmission. This process shakes off fine borax dust adhering to the inner wall without the need for additional power, preventing dust accumulation and solving the problem of secondary dust pollution. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of the present invention;

[0036] Figure 2 This is an enlarged view of the reinforced cover plate of the present invention;

[0037] Figure 3 This is a bottom view of the soft cover of the present invention;

[0038] Figure 4 This is an enlarged view of the top protrusion of the present invention;

[0039] Figure 5 This is an exploded view of the connection between the soft cover and the rigid conical cover of the present invention;

[0040] Figure 6 This is a schematic diagram of the structure of the movable plate of the present invention;

[0041] Figure 7 This is a schematic diagram of the structure of the functional board of the present invention;

[0042] Figure 8 This is a schematic diagram of the triangular plate structure of the present invention;

[0043] Figure 9 This is a schematic diagram of the structure of the movable inner insertion rod of the present invention.

[0044] In the diagram: 1. Crusher main body; 2. Crusher feeding hopper; 3. Reinforced cover plate; 4. Cover plate opening; 5. Soft cover; 6. Reserved markings; 7. Flexible side cover; 8. Front cover; 9. Support arm; 10. Top convex plate; 11. Connecting shaft; 12. Rotating shaft; 13. Operating lever; 14. Hard conical cover; 15. Hard collar; 16. Hard inner ring; 17. Clamp; 18. Rib; 19. Rocker arm; 20. Moving plate; 21. Convex plate 21. Ball; 22. Extension plate; 23. Moving groove; 24. Sliding rod; 25. Contact rod; 26. Functional plate; 27. Mounting hole; 28. Functional bending rod; 29. ​​Connecting vertical plate; 30. Threaded locking hole; 31. Vibrating contact element; 32. Triangular plate; 33. Arc-shaped rail groove; 34. Support rod; 35. Positioning sleeve plate; 36. Moving inner rod; 37. Spring assembly; 38. Positioning inner hole; 39. Guide connecting pipe; 40. Screening and conveying assembly. Detailed Implementation

[0045] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0046] Example

[0047] like Figure 1-9 As shown in the figure, an embodiment of the present invention proposes a waste gas purification device based on the production of borax antioxidants, including a crusher main body 1 and a crusher feeding bin 2 connected to the top of the crusher main body 1. Various raw materials are fed into the crusher main body 1 through the crusher feeding bin 2 for crushing. Screening, negative pressure conveying and conical double spiral mixer are respectively connected to the bottom of the crusher main body 1 so that the raw materials are crushed, screened and mixed evenly before being discharged for subsequent metering and packaging. During the crushing and screening process, dust is generated and overflows upward from the feeding port of the crusher feeding bin 2. Therefore, the design is to purify the overflowing dust during the crushing and screening process. The design structure is as follows.

[0048] A reinforcing cover plate 3 is installed at the top opening of the crusher feeding bin 2. The reinforcing cover plate 3 can be connected by welding or other reinforcement methods. A cover plate opening 4 is opened on the surface of the reinforcing cover plate 3 so that the opening of the cover plate opening 4 is completely aligned with the feeding port of the crusher feeding bin 2, so that the material can be fed into the crusher feeding bin 2 through the cover plate opening 4.

[0049] A set of soft covers 5 are installed above the reinforced cover plate 3. A set of hard conical covers 14 are set above the soft covers 5, so that the top of the soft covers 5 is connected to the bottom of the hard conical covers 14. The hard conical covers 14 are made of hard materials and have a small overall area. The soft covers 5 are made of soft materials and have a large overall area. Dust overflows upward through the opening 4 of the cover plate and is intercepted by the hard conical covers 14 through the soft covers 5. Since there is a negative pressure airflow inside the soft covers 5, in order to prevent the soft covers 5 from collapsing inward, multiple rubber and other soft materials with a certain supporting strength ribs 18 are set at the corners of the soft covers 5, so that the bottom of the soft covers 5 is in an outward expansion state.

[0050] To achieve a high-strength sealed connection between the soft cover 5 and the rigid conical cover 14, and to prevent dust from leaking out from the gaps, a ring-shaped rigid collar 15 is reinforced at the bottom of the rigid conical cover 14, and a rigid inner ring 16 made of rigid material is connected to the top of the soft cover 5. The diameter of the rigid inner ring 16 is smaller than that of the rigid collar 15, so that the rigid inner ring 16 can be inserted into the inner side of the rigid collar 15 from bottom to top, so that the bottom of the rigid collar 15 presses against the retaining ring position outside the rigid inner ring 16. Then, a clamp 17 is fitted on the outside of the rigid collar 15 for reinforcement, improving the sealing performance of the connection. At the same time, the tops of multiple ribs 18 are connected to the rigid inner ring 16 to enhance stability.

[0051] To ensure that the smoke and dust overflowing from the cover opening 4 are completely drawn in, the soft cover 5 is designed to completely enclose the cover opening 4. However, since the completely enclosed design affects material feeding, the front and sides of the soft cover 5 are designed to be deformable. The front and sides of the soft cover 5 are respectively the front baffle 8 and the flexible side cover 7, which are connected to each other. When material feeding is required, the flexible side cover 7 is rotated around the bottom as the axis, so that the front baffle 8, which is vertically covering the reinforced cover 3, rotates to a horizontal state, and the flexible side cover 7, which is in the unfolded state, rotates to a retracted state, so that an opening is formed on one side of the cover opening 4, through which material can be fed into the cover opening 4.

[0052] As described above, the flexible side cover 7 and the front cover 8 need to be moved by external force. Therefore, the surface of the flexible side cover 7 is reinforced with a support arm 9, and a top protrusion 10 extends upward from the top of the reinforced cover plate 3. The bottom of the support arm 9 is fixedly connected to a connecting shaft 11, and the side end of the connecting shaft 11 is fixedly provided with a rotating shaft 12 inserted into the top protrusion 10. The rotating shaft 12 can rotate inside the top protrusion 10, and the rotation of the rotating shaft 12 can make the flexible side cover 7 and the front cover 8 move.

[0053] To facilitate the rotation of the rotating shaft 12, a connecting operating rod 13 is fixedly installed at one end of the rotating shaft 12, so that the operating rod 13 is in a U-shape and surrounds the front of the soft cover 5. In actual operation, pushing the operating rod 13 up and down will cause the operating rod 13 to move in an arc with the rotating shaft 12 as the axis, thereby dragging the rotating shaft 12 and thus moving the flexible side cover 7 and the front cover 8.

[0054] To restrict the movement of the operating lever 13, a triangular plate 32 is fixed to the reinforcing cover plate 3. An arc-shaped groove 33 is formed on the surface of the triangular plate 32. A support rod 34 is fixed to the surface of the operating lever 13, and a positioning sleeve 35 is fixed to the side of the support rod 34. A movable inner rod 36 is slidably connected inside the positioning sleeve 35. A spring assembly 37 is installed between the positioning sleeve 35 and the movable inner rod 36. The surface of the arc-shaped groove 33 has a positioning inner hole 38 that allows the front end of the movable inner rod 36 to be inserted. Figure 8 as well as Figure 9 As shown, the front end of the movable inner rod 36 moves along the groove of the arc-shaped rail groove 33 to provide stability to the operating rod 13. At the same time, the two ends of the arc-shaped rail groove 33 limit the maximum rotation of the operating rod 13. When the operating rod 13 rotates to the maximum value, the movable inner rod 36 is inserted into the positioning inner hole 38. When the movable inner rod 36 is inserted into the top positioning inner hole 38, the front cover 8 is in the unfolded state. Conversely, when the movable inner rod 36 is inserted into the bottom positioning inner hole 38 of the arc-shaped rail groove 33, the soft cover 5 completely closes the top of the cover plate opening 4. The dust generated by subsequent crushing and screening can be sucked away by negative pressure, which greatly avoids dust overflow.

[0055] Because the soft cover 5 has a large area, and dust can be adhesive, it will eventually adhere to the inner wall of the soft cover 5. To solve this problem, the following design is adopted: an extension plate 22 with a diameter larger than that of the hard collar 15 is fixed to the outer wall of the hard collar 15. The surface of the extension plate 22 is provided with a moving groove 23. A sliding rod 24 is slidably connected in the groove of the moving groove 23. The top of the sliding rod 24 extends to one side and is connected to a contact rod 25. A detachable part is installed in the cavity of the moving groove 23, with one end connected to the sliding rod 24 and the other end connected to the inner wall of the moving groove 23. A high-durability spring is used to compress the sliding rod 24 within the groove of the moving slot 23. When the sliding rod 24 moves toward the center of the outer extension plate 22, the spring is compressed; conversely, it is released elastically, pushing the sliding rod 24 outward. The moving plate 20 is installed at the front end of the contact rod 25. Multiple sets of convex balls 21 are spaced apart on the surface of the moving plate 20. A rocker arm 19 is reinforced to the surface of the moving plate 20. The bottom of the rocker arm 19 is fixed to the surface of the rotating shaft 12, so that the rocker arm 19 can rotate synchronously with the movement of the operating rod 13.

[0056] Meanwhile, a functional plate 26 is fixed on the surface of the contact rod 25. The surface of the functional plate 26 is provided with a mounting hole 27. A functional bending rod 28 is inserted into the mounting hole 27. A connecting plate 29 is fixed at the bottom of the functional bending rod 28. The surface of the connecting plate 29 is provided with threaded locking holes 30 that are evenly distributed longitudinally. A vibrating contact 31 is screwed into the threaded locking holes 30.

[0057] like Figure 7 The structure shown involves inserting the functional bending rod 28 into the mounting hole 27 and locking the angle of the functional bending rod 28 with the threaded nut at the end. Then, a vibrating contact 31 of appropriate length is screwed into the threaded locking hole 30, so that the front end of the vibrating contact 31 can contact the surfaces of the soft cover 5 and the hard conical cover 14. As the operating rod 13 moves, it also drives the moving plate 20 to move. The contact rod 25 is always pressed on the convex ball 21, so that the contact rod 25 is in a reciprocating motion state. Thus, through the transmission of the connecting plate 29, a slight tapping is achieved on the soft cover 5 and the hard conical cover 14, which shakes out the impurities and dust adhering to the surface in time. The top of the hard conical cover 14 is connected to the guide tube 39 and the bracket structure for stabilizing the hard conical cover 14. The material is transferred to the subsequent processing device through the guide tube 39.

[0058] The complete process steps are as follows:

[0059] S1. Device Installation and System Connection: Fix the reinforcing cover plate 3 on the top of the crusher feeding hopper 2, ensuring the cover plate opening 4 is precisely aligned with the feeding hopper; insert the hard inner ring 16 at the top of the soft cover 5 into the hard collar 15 at the bottom of the hard conical cover 14, and lock and seal it with the clamp 17 to complete the dust collection cover assembly; connect the guide pipe 39 at the top of the hard conical cover 14 to the cyclone pretreatment device, bag filter, and exhaust gas purification tower in sequence, and connect the screening and conveying assembly 40 at the bottom of the crusher main body 1 to the screening machine and the conical double spiral mixer in sequence to form a complete production system of feeding-crushing-screening-mixing-exhaust gas purification.

[0060] S2. Feeding operation and dust collection hood opening and closing: The operating lever 13 rotates around the rotating shaft 12, causing the flexible side cover 7 and front cover 8 to rotate and unfold, leaving space for feeding through the cover opening 4; the raw materials for borax antioxidant production are fed into the main body 1 of the crusher through the crusher feeding bin 2. After feeding is completed, the operating lever 13 is reversed to make the flexible side cover 7 and front cover 8 rotate and close. The moving inner insertion rod 36 is inserted into the positioning inner hole 38 under the action of the spring assembly 37, completing the sealing and locking of the dust collection hood.

[0061] S3. Crushing, Screening and Mixing Operation: The crusher is started, and the raw material is crushed in the main body 1 of the crusher. The crushed material falls into the screening and conveying component 40, is screened and graded by the screening machine, and qualified material is conveyed to the conical double spiral mixer for uniform mixing, and then enters the metering and packaging process. The dust and exhaust gas generated during the crushing and screening process overflows upward from the crusher feeding hopper 2.

[0062] S4. Negative pressure dust collection and linkage dust vibration pretreatment: The negative pressure dust collection system is activated, and a stable micro-negative pressure is formed inside the hard conical hood 14 and the soft hood 5, which firmly gathers the overflowing dust and exhaust gas in the dust collection chamber; the opening and closing action of the operating lever 13 synchronously drives the rocker arm 19 and the moving plate 20 to move, and drives the contact rod 25 to move back and forth through the convex ball 21 and the sliding insert 24, so that the vibrating contact 31 intermittently knocks the outer wall of the soft hood 5 and the hard conical hood 14, shaking off the borax fine powder adhering to the inner wall, thus completing the dust pretreatment.

[0063] S5. Waste gas classification, purification, and emission compliance: The dust-laden waste gas, after pretreatment, enters the cyclone pretreatment device through guide pipe 39 to remove large dust particles, then enters the bag filter to filter fine dust, and finally undergoes deep purification treatment in the waste gas purification tower to remove trace impurities and odors. The purified gas meets environmental emission standards and is then discharged at high altitude. The borax dust collected by filtration can be recycled and reused in the production system to reduce raw material loss.

[0064] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste gas purification device based on borax antioxidant production, comprising a pulverizer main body (1) and a pulverizer feeding bin (2) connected to the top of the pulverizer main body (1), characterized in that: The reinforced cover plate (3) is installed at the opening of the feed bin (2) of the crusher, the soft cover (5) is installed above the main body (1) of the crusher, the surface of the soft cover (5) is connected to the front baffle (8), and the two sides of the front baffle (8) are connected to the flexible side cover (7); the surface of the flexible side cover (7) is reinforced with a support arm (9). The top of the reinforced cover plate (3) is provided with a top protrusion plate (10), and the bottom end of the support arm (9) is fixed with a connecting shaft (11). The side end of the connecting shaft (11) is fixed with a rotating shaft (12) that rotates in the top protrusion plate (10); so that the flexible side cover (7) and the front cover (8) can expand or close the side space of the soft cover (5) with the rotating shaft (12) as the rotation axis.

2. The waste gas purification device based on borax antioxidant production according to claim 1, characterized in that: The reinforced cover plate (3) has a cover plate opening (4) that is compatible with the feeding port of the crusher feeding bin (2); the flexible side cover (7) and the front cover (8) can be unfolded to cover the outside of the opening of the cover plate opening (4).

3. The waste gas purification device based on borax antioxidant production according to claim 1, characterized in that: An operating rod (13) is fixed to the side end of the rotating shaft (12), and the operating rod (13) is U-shaped and surrounds the front side of the soft cover (5).

4. The waste gas purification device based on borax antioxidant production according to claim 1, characterized in that: A rigid conical cover (14) is installed above the soft cover (5), wherein a rigid collar (15) is connected to the bottom of the rigid conical cover (14), and a rigid inner ring (16) is connected to the top of the soft cover (5); the diameter of the rigid inner ring (16) is smaller than the diameter of the rigid collar (15) so that the rigid inner ring (16) can be inserted longitudinally into the inside of the rigid collar (15); The rigid collar (15) is fitted with a clamp (17) for locking the rigid collar (15) and the rigid inner ring (16).

5. The waste gas purification device based on borax antioxidant production according to claim 4, characterized in that: Ribs (18) are installed at the corners of the soft cover (5), and the tops of the multiple sets of ribs (18) are connected to the rigid inner ring (16).

6. The waste gas purification device based on borax antioxidant production according to claim 5, characterized in that: The top of the rigid conical cover (14) is connected to a guide tube (39) and a support structure for stabilizing the rigid conical cover (14), with the bottom of the support connected to the frame.

7. The waste gas purification device based on borax antioxidant production according to claim 4, characterized in that: The outer wall of the rigid collar (15) is fixed with an extension plate (22) with a diameter larger than that of the rigid collar (15). The surface of the extension plate (22) is provided with a moving groove (23). A sliding rod (24) is slidably connected in the groove of the moving groove (23). The top of the sliding rod (24) extends to one side and is connected to a contact rod (25). The cavity of the movable groove (23) is equipped with a detachable, high-durability spring, one end of which is connected to the sliding rod (24) and the other end of which is connected to the inner wall of the movable groove (23).

8. The waste gas purification device based on borax antioxidant production according to claim 7, characterized in that: The movable plate (20) is installed at the front end of the contact rod (25), wherein multiple sets of convex balls (21) are installed on the surface of the movable plate (20) at intervals. A functional plate (26) is fixed on the surface of the contact rod (25), and a mounting hole (27) is opened on the surface of the functional plate (26). A functional bending rod (28) is inserted into the mounting hole (27). The bottom of the functional bending rod (28) is fixed with a connecting plate (29). The surface of the connecting plate (29) is provided with threaded locking holes (30) distributed longitudinally at equal intervals. A vibrating contact (31) is screwed into the threaded locking hole (30).

9. A waste gas purification device based on borax antioxidant production according to claim 8, characterized in that: The surface of the movable plate (20) is reinforced with a rocker arm (19), the bottom of the rocker arm (19) is fixed to the surface of the rotating shaft (12), so that the rocker arm (19) can rotate synchronously with the movement of the operating rod (13); a triangular plate (32) is fixed on the reinforced cover plate (3), an arc-shaped rail groove (33) is opened on the surface of the triangular plate (32), a support rod (34) is fixed on the surface of the operating rod (13), and a positioning sleeve (35) is fixed on the side of the support rod (34). The positioning sleeve (35) is internally slidably connected to a movable inner rod (36), and a spring assembly (37) is installed between the positioning sleeve (35) and the movable inner rod (36). The surface of the arc-shaped rail groove (33) is provided with a positioning inner hole (38) that allows the front end of the movable inner rod (36) to be inserted.

10. A waste gas purification process based on borax antioxidant production, characterized in that: The process is completed using the waste gas purification device based on borax antioxidant as described in claim 1, and includes the following steps: S1. Device installation and system integration: The reinforcing cover plate (3) is fixedly installed on the top of the feed hopper (2) of the crusher, so that the opening (4) of the cover plate is precisely aligned with the feed hopper; the hard inner ring (16) at the top of the soft cover (5) is inserted into the hard collar (15) at the bottom of the hard conical cover (14), and locked and sealed by the clamp (17) to complete the dust collection cover assembly; the guide pipe (39) at the top of the hard conical cover (14) is connected in sequence to the cyclone pretreatment device, the bag dust collector, and the exhaust gas purification tower, and the screening and conveying assembly (40) at the bottom of the crusher main body (1) is connected in sequence to the screening machine and the conical double spiral mixer to form a complete production system of feeding-crushing-screening-mixing-exhaust gas purification; S2. Feeding operation and dust collection hood opening and closing: Move the operating lever (13) to rotate around the rotating shaft (12) and drive the flexible side cover (7) and front cover (8) to rotate and unfold, leaving the feeding space of the cover opening (4); put the raw materials for borax antioxidant production into the main body (1) of the crusher through the crusher feeding bin (2). After feeding is completed, move the operating lever (13) in the opposite direction to make the flexible side cover (7) and front cover (8) rotate and close. Move the inner insertion rod (36) into the positioning inner hole (38) under the action of the spring assembly (37) to complete the sealing and locking of the dust collection cover. S3. Crushing, sieving and mixing operations: Start the crusher, and the raw material is crushed in the main body (1) of the crusher. The crushed material falls into the screening and conveying assembly (40), is screened and graded by the screening machine, and qualified material is transported to the conical double spiral mixer for uniform mixing, and then enters the metering and packaging process. The dust and exhaust gas generated during the crushing and screening process overflows upward from the crusher feeding bin (2). S4. Negative pressure dust collection and linked dust vibration pretreatment: When the negative pressure dust collection system is turned on, a stable micro-negative pressure is formed inside the hard conical hood (14) and the soft hood (5), which firmly gathers the overflowing dust and exhaust gas in the dust collection chamber; the opening and closing action of the operating lever (13) synchronously drives the rocker arm (19) and the moving plate (20) to move, and drives the contact rod (25) to move back and forth through the convex ball (21) and the sliding plug (24), so that the vibrating contact (31) intermittently knocks the soft hood (5) and the outer wall of the hard conical hood (14), shaking off the borax fine powder adhering to the inner wall, and completing the dust pre-treatment; S5. Graded purification and standard emission of exhaust gas After pretreatment, the dusty exhaust gas enters the cyclone pretreatment device through the guide pipe (39) to remove large particles of dust, then enters the bag filter to filter fine dust, and finally undergoes deep purification treatment in the exhaust gas purification tower to remove trace impurities and odors. The purified gas is discharged at high altitude after meeting the environmental emission standards. The borax dust collected by filtration can be recycled and reused in the production system to reduce raw material loss.

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